diff --git a/.hgtags b/.hgtags
index 354e1e016309..5eb25a75c8f5 100644
--- a/.hgtags
+++ b/.hgtags
@@ -312,3 +312,4 @@ c9a192c047cde29cd4369733df6c27c9326990e9 FIREFOX_BETA_131_BASE
 91eddc0bb6d90cdabdf5b62e6cbc91be08013a4f FIREFOX_BETA_132_BASE
 eaad836f0a492448489e0ffc73f261abda8b4b85 FIREFOX_NIGHTLY_132_END
 f8047162f57463ca16a04358355c2a6be8e18037 FIREFOX_BETA_133_BASE
+8dae036c3388e3a50a8337590d62780805b4c680 FIREFOX_NIGHTLY_133_END